Recent developments in nickel-based superalloys for gas turbine applications: Review

Gudivada, Giridhar; Pandey, Akash

doi:10.1016/j.jallcom.2023.171128

Cited by 74 publications

(8 citation statements)

References 158 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…At near–liquid nitrogen temperatures, the cut-through of B2 intermetallic particles by dislocations within the FCC austenite matrix in the CCS (Figs. 3 and 4) defies traditional wisdom, as dislocation bowing for hard intermetallic is the dominant observation across various FCC alloys—e.g., steels ( 18 ), Al alloys ( 69 ), Ni alloys ( 70 ), and M/HEAs ( 71 )—whereas dislocation shearing prevails for coherent precipitation-hardened alloy systems ( 3 ). This distinct feature arises from an extremely high friction stress, >1 GPa at near-cryogenic temperatures ( 16 ), caused by the LCO zones and the high solid solution friction stress, which both enhance the resistance to dislocation glide in the austenitic matrix.…”

Section: Resultsunclassified

Shearing brittle intermetallics enhances cryogenic strength and ductility of steels

Wang,

Song,

Elkot

et al. 2024

Science

View full text Add to dashboard Cite

Precipitates are crucial for crafting mechanically strong metallic materials. In this work, we report the dislocation cutting of B2 (ordered body-centered cubic) nanoprecipitates, typically considered nonshearable intermetallics, in a lightweight compositionally complex steel during cryogenic tensile loading. Shearing is enabled by the high strength level for dislocation glide within the austenitic matrix, attributed to the substantial strengthening from subnanoscale local chemical ordering zones and the pronounced solid solution strengthening from the multiprincipal elements in the matrix. This mechanism not only harnesses the intense strengthening and strain hardening provided by otherwise impenetrable brittle nanoprecipitates but also introduces ductility through their sequential shearing with ongoing deformation. Our steel thus showcases ultrahigh cryogenic tensile strength up to 2 gigapascal at a remarkable tensile elongation of 34%. This study reveals a new strategy for designing high-performance structural materials.

show abstract

Section: Resultsunclassified

Shearing brittle intermetallics enhances cryogenic strength and ductility of steels

Wang,

Song,

Elkot

et al. 2024

Science

View full text Add to dashboard Cite

show abstract

“…Nickel-based single crystal superalloys (NBSC) find extensive applications in cutting-edge power propulsion systems such as aerospace, naval, and industrial gas turbine engines, owing to their exceptional hightemperature strength, creep properties, oxidation, and fatigue resistance [1][2][3][4][5]. Despite the intricate composition of NBSC superalloys, their microstructure remains relatively straightforward, primarily comprising a matrix phase (γ phase) and a reinforcing phase (γ′ phase) organized in a distinctive 'cross-shaped' dendritic structure.…”

Section: Introductionmentioning

confidence: 99%

Atomic behavior of nickel-based single crystal superalloy during heat treatment process based on molecular dynamics

Zheng,

Bian,

Chen

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

The heat treatment process plays a pivotal role in enhancing the characteristics of nickel-based single crystal (NBSC) superalloys. Nevertheless, there exists a paucity of comprehensive investigations concerning the microstructural evolution of NBSC superalloys during heat treatment. This study employs a molecular dynamics simulation method to control the temperature of the NBSC superalloy precisely, aiming to unveil intricate details regarding microstructural evolution, temperature distribution patterns, mechanical properties, and other pertinent aspects during the cooling phase. Additionally, a comparative analysis of internal defect evolution under varying cooling rates is undertaken. The findings highlight the consistently heightened activity of atoms in the γ phase compared to those in the γ' phase. Notably, the stability disparity between these phases gradually diminishes as the temperature decreases during the cooling process. At elevated temperatures, the prevalence of amorphous phases and dislocations in the γ phase channel diminishes concomitantly with the temperature reduction. Strain distribution in the alloy primarily concentrates in the γ phase channel and the central cross position of the γ' phase. The temperature reduction correlates with a decline in the alloy model's strain. In the initial phase of strain reduction, stress fluctuation trends in the X, Y, and Z directions exhibit an initial increase followed by a gradual decrease. Furthermore, the atomic number of HCP defects and dislocation density exhibit distinct patterns of change contingent upon the cooling rates employed.

show abstract

“…On other occasion, Vinosha et al, (2021) investigated nickel substitution in cobalt ferrite nanoparticles to enhance magneto-optical, electrical, and acoustical properties. Furthermore, the study of nickelbased superalloys were reported for many applications using various mechanical and heat treatments to yield acceptable limit material performance (Cao et al, 2021;Ding et al, 2020;Gudivada and Pandey, 2023).…”

Section: Introductionmentioning

confidence: 99%

Application of MLR Method and Pearson Correlation on Nickel Extraction from Laterite Using Nitric Acid

Dahani,

Sundari,

Nugraheni

et al. 2024

ijcsrr

View full text Add to dashboard Cite

Indonesia is a country rich in laterite mining especially in Celebes island and northern Moluccas. Laterite is a mineral rich with precious nickel. Nitric acid leaching has been used for nickel extraction from laterite under the influence of nitric acid concentration (2.0 M, 4.0 M, and 6.0 M) and leaching temperature (65oC, 70oC, and 75oC) during 60 min. at 300 rpm. The preliminary study aims to apply multiple linear regression (MLR) method to examine the dominant effect between acid concentration and leaching temperature on nickel extraction, and also Pearson correlation to study significant correlation between the variables involved (acid concentration, leaching temperature, and nickel concentration). The method and results is related to acid leaching at varied temperature set up as predictors and nickel concentration as dependent variable in the MLR equation using the enter method. The MLR method showed that acid concentration gave significant effect on nickel concentration, however, the leaching temperature showed no significant effect on nickel extraction at t ≤ 0.05. The Pearson correlation showed acid concentration correlated significantly with nickel concentration. The Kolmogrov-Smirnov (K-S) test showed normality for distribution of nickel concentration. The acid leaching method is potential for nickel extraction from laterite using extensive range of acid concentrations and leaching temperatures to improve nickel extraction.

show abstract

Recent developments in nickel-based superalloys for gas turbine applications: Review

Cited by 74 publications

References 158 publications

Shearing brittle intermetallics enhances cryogenic strength and ductility of steels

Shearing brittle intermetallics enhances cryogenic strength and ductility of steels

Atomic behavior of nickel-based single crystal superalloy during heat treatment process based on molecular dynamics

Application of MLR Method and Pearson Correlation on Nickel Extraction from Laterite Using Nitric Acid

Contact Info

Product

Resources

About